Drawing-press.



W. KLOOKE.

DRAWING PRESS.

APPLICATION FILED JULY 29, 1909.

' Patented Aug. 9, 1910.

a SHEETS-SHEET 1.

INVE'NTOR WITNESSES:

APPLICATION FILED JULY 29, 1909.

' W. KLOGKE.

DRAWING mass.

Patented .Aug. 9,1910.

3 SHBETB-SHEE'I' 2L .INVE NTOR liap-lltomeys,

W. KLOGKE.

DRAWING PRESS.

APPLICATION FILED JULY 29, 1909.

967,022. Patented Aug. 9, 1910.

FIG. 6.

INVENTOR WITNESSES:

' 3BHEETS-SHEET 3.

-WILLIAM KLOCKE, OF NEW YQRK, N. Y.,

ASSIGNOR T0 E. W. BLISS COMPANY, .OF

.BRUOKLYN', NEW YORK, A CORPORATION OF WEST VIRGINIA.

nnawIne-rnnss.

To-all whom it may concern:

Be it known that T, WILLIAM KLOGKE, a citinen of-the United States, residing in the borough of Brooklyn, county-of Kings, city and State of New York, have invented certain new and usefulilmprovements in Drawing-Fresses, of which the following is a specification.

The invention. aims to provide improve- .ments in drawing, presses to adapt them s ecially for drawing work with wide 1 anges, and for other purposes. For this purpose the press has dies in which successive drawing operations are performed on the work, one of the dies being movable relatively toanother after the performance of a drawing operation with the first.

@ther points of improvement are referred to in detail hereinafter.

The accompanying drawings illustrate machines embodying the inventlon.

Figure 1 is partly an elevation and partly a section of a double drawing press embodying the invention; Fi 2 is a similar view of dies and unches o? the same press in a later position; Figs. 3, 4: and 5 are sectional views of the work in successive stages; Fig.

6 is a vertical sectional view of the principal parts of another machine embodying the 1nvention.

Referring to the embodiments of the invention illustrated, the machine carries an upper fixed blank holder A on the lower face of a slide A between the side frames B; and a first larger die 0 and second smaller die D. The first or outer punch 1E and the second or inner punch F are reciprocated, the latter by means of a connecting rod G and a cross head H, and the former by means of toggle mechanism J con-.

nected to the cross head H so as to communicate to the first punch the first movement of the cross head, and to hold the first punch steady during the continued movement of the cross head and the second drawing operation. This mechanism for contributing the necessary movement to the punches, may be similar to that described in m revious application Serial No. 424,315, fi e March 31, 1908, and need not be referred to here in detail.

The flat sheet or blank K (Fig. 3) is first gripped between the fixed blank holder A and the upper face of the first die (3., The outer punch F] then advances (the inner Specification of LettersPatent. I Patented Aug, 9, 1910. Application filed $11339, 1809. Serial flu. 510,239.

punch being slightly retracted within the outer one as shown in Fig. 1) and draws the tube L with the flanges M as shown in Fig. i. In this first drawing operation it isnot possible to use a blank of such large dimensions as to give a wide flange at M, without producing an excessive crinklin in drawing the blank down to the smal er diameter necessary, and destroying the blank in many cases. I propose therefore after forming the first flange M, to add to its "width by an extension inward, using a second drawing op-- oration for the purpose.

At the lowest point of movement Off the. outer punch E it grips the margin of the bottom of the tube lL'upon the second die D, and this punch and dieserve as blank holders' for the second operation. The inner punch F draws the tube to a smaller diameter,as shown at N (Fig. 5). hill-portions of the blank in passing from the shape of the tube L to that of the "tube N, are first reformed into approximately their original arge flat condition as a ring 0 between the tube formed by the first draw and the smaller tube in process of formation; and it is this ring 0 which is applied to the inner edge of. the first flan e M to increase its width. This result is e ected preferably by bringing down the first dieC just before or-dur'ing the second drawing 0 eration,-so as to avoid the drawing of the shape. Fig. 2 showsthe relative positions of the dies "and punches during the second 7 drawing operation. In its final position the upper-race of the first die (3 rests substantially parallel with the upper face of the second die JD, *soythat the flange M and the rin U are merged into a single wide flange F {Fig 5).

,Various arrangements of the dies and punches and of the mechanisms for actuating and supporting them, may be provided for securing the desired result. The greferable way is to withdrawthe first die after 1ts use in the first drawin operation, and the withdrawal is preferab y efiected vertically, the blank holder A and the lower die D being fixed and the punches being movable in the ordinary way; thus involving very little departure from the design of punches now in general use.

In Fig. 1 the inner die D 1s removably mounted directly on a. column Q extending to the base of the machine. Dies of various ange M into a cylindrical designs may be substituted for each other readily up'on the top of thecolumri. The

' outer die'C is mounted upon a bed S which the gear X upon the main shaft, Y of the i the first die C is sup upon suitable machine. p J

Fig. 6 illustrates a slightly difieren't construction. The upper blank holder A and the outer and inner punches E and F are the same as in Fig. 1. The second die D, how ever, is supported uponthe fixed bed Z, and orted upon rods a which pass through the ed Z and are mounted at their lower ends upon a slide 6 sliding guides on the lower part of the bed Z. The slide 6 is given the necessary vertical movement through links 0 connected to the arm U on the shaft V which, as in the mechanism of Fig. 1, is oscillated by means of an arm W having a rollerat its end running in a cam-groove in the inner .face of the gear X. i

What I claim is 1. A drawing press having dies in which successive drawing operations are performed on each piece of work, means for holding v the first'one of said dies in clamping position operation;

2. A drawing press havingv dies in. which during the first drawing removing it therefrom uring the next successive drawing operations are performed on each piece of work, the second of said dies having its upper end within the lower end of the first, a blank holder between which and the upper end of the first die the blank is held and an outer flange may be formed, an outer punch fitting the first die and between which and the upper end of the second die the once-drawn work is held and an inner flange may be formed, an

o eration and forinner punch fitting the second die, the first die bein movable relatively to the blank holder a er the first drawing operationto permit the bringing of the outer one of said flanges toward the inner one in the second drawmg operation.

3. A drawing press having dies in which successive drawing operations are performed on each piece of work, a fixed blank holder and punches corresponding respectively with said dies, means for moving the first one of said dies to clamp a blank between itself and the blank holder and for holding said die in's'aid position durin the first drawing operation and withdrawing it during the next drawing operation.

4. A drawing press having a pair of dies C and D and a pair of punches E and F corresponding thereto, means for holding said dies in position to effect a first drawing operation, and means for thereafter withdrawing the first die 0 fr 111 said position and performing the second drawing operation while said first die is withdrawn.

5. A drawing press having a first outer die C, a second inner die D fitting \Within the former, punches cooperating with said dies, said second die being fixedly supported and said first die being movable from its drawing position to permit the second drawing. operation without the use of said first die.

6. A drawing press having dies C and D,

punches cooperating therewith, a fixed support for the die D, a vertically movable support for the die 0, and means connected with the punch actuating mechanism for lowering said -vertically movable support and removing said die C from drawin o'sition during the drawing operation with the die D.

' In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

- WILLIAM KLOOKE.

Witnesses:

D. ANTHONY UsINA, FRED WHITE. 

